# Smart ring Colmi R03 18.9 mm size 9 Black — wearable health & notification device

**URL:** https://aio.lv/en/product--colmi-r03-black-9--11108742
**Data updated:** 2026-03-16 16:35 (EET)
**Category:** Smart rings
**Manufacturer:** Colmi
**Manufacturer code:** R03 Black 9
**EAN:** 6972436985593
**Warranty:** 1 Year
**Availability:** Available for order
**Price:** 28.49 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 23.55 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--colmi-r03-black-9--11108742

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Colmi R03 smart ring in Black, model R03 with 18.9 mm inner diameter (size 9). A compact wearable that monitors basic health metrics and delivers smartphone notifications. Designed for everyday use, it provides discreet on-finger tracking, vibration alerts and compatibility with supported Colmi apps. Useful for users who prefer a ring form factor for activity monitoring and notification management.

## Long description

Colmi R03 smart ring in black (inner diameter 18.9 mm, size 9) is a compact wearable that provides on-finger monitoring of basic health metrics and records physical activity. The ring is made of a titanium alloy, weighs 4.7 g and is rated 5ATM for water resistance. It connects via Bluetooth 5.0 to the QRing app (Android, iOS, Harmony OS) for viewing daily, weekly and monthly reports and managing settings. The set includes the smartring, a magnetic charging case with USB-C, a USB-C cable and a user manual.
Advantages
The Colmi R03 combines lightweight titanium alloy construction with 5ATM water resistance and long battery support via a portable charging case. It measures heart rate, blood oxygen saturation and sleep phases, records steps, calories and distance, and supports 21 sports modes. The ring charges in about 1 hour, offers 3–5 days of standalone operation and the included case can recharge the ring multiple times from its 200 mAh battery.
Suitable for
Everyday health monitoring (sleep, heart rate, SpO2)
Activity tracking and workout logging
Swimming and water-based exercise (5ATM)
Users who prefer discreet wearable form factor
Key specifications
Manufacturer: Colmi
Model: R03
Color: Black
Size / Inner diameter: 9 / 18.9 mm
Material: Titanium alloy
Weight: 4.7 g
Main chipset: BlueX Micro RF03
Memory: ROM 512 KB
HR sensor: Vcare VC30F
Accelerometer: STK8321
Bluetooth: 5.0
Ring battery: Li‑Po 15 mAh, magnetic charging, ~1 h charge time, 3–5 days operating time
Charging case battery: Li‑Po 200 mAh, USB‑C charging, recharges ring up to 13 times, ~1 h case charge time
Number of charging cycles (ring/case): over 300 / approximately 300
Water resistance: 5ATM
Compatibility: Android 4.4+; iOS 8.0+; Harmony OS
App: QRing
Available app features: step counter, calories, distance, heart rate, sleep monitoring, 21 sports modes, exercise log, blood pressure, SpO2, stress level, remote photo
Updates: OTA
How to use
Install the QRing app on a compatible Android or iOS device and pair the Colmi R03 via Bluetooth 5.0. Wear the ring on a finger that provides a comfortable and stable fit, ensuring the sensors maintain contact with the skin. Use the app to view real-time measurements, configure sport modes and access daily, weekly and monthly health reports. When the ring battery is low, place it in the magnetic charging case and plug the case into power via the included USB‑C cable.
Usage recommendations
For the most accurate heart rate, SpO2 and sleep readings, wear the ring snugly but comfortably and keep the sensor area clean. Avoid exposing the ring to strong chemicals or abrasive surfaces; although it is 5ATM water resistant, avoid prolonged exposure to hot water and high-pressure jets. Charge the case and ring regularly to maintain continuous monitoring and install app updates (OTA) when available.

## FAQ

### How much does the Smart ring Colmi R03 — 18.9 mm size 9 Black cost, and is it available for purchase?

The price is 28.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 142 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Colmi products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Colmi service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11108742/61795139_large.webp